Test your basic knowledge |

Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Can survive ~7 days in cow. vast majority <48 hours






2. Milk is 15% ________ and 85% __________.






3. Luteolysis happens because of the ____________ hormone






4. 45-60 days after breeding; re-breed as required






5. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






6. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






7. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






8. FEED






9. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






10. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






11. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






12. 1-3 days






13. Milk is 15% ________ and 85% __________.






14. 30-38 hours after estrus cycle begins






15. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






16. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






17. FEED






18. Allows extension of penis without fibro-elastic penis






19. Luteolysis happens because of the ____________ hormone






20. Sperm production






21. Failure to have one testis (gonad) to descend






22. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






23. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






24. 30-38 hours after estrus cycle begins






25. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






26. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






27. 114 days






28. Can survive ~7 days in cow. vast majority <48 hours






29. Milk ~305 days - dry 60 days prior to calving






30. 16-20 hours






31. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






32. 265-285 days






33. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






34. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






35. Days which have increasing daylight hours


36. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






37. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






38. The more stressed out the male is - the less sperm he is going to produce






39. (LH) causes female's egg to break (her period)






40. (male) pushes the testes upward toward the body for warmth or protection






41. 30 hours after estrus begins






42. To remove/separate testicles from animal's body before animal reaches puberty






43. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






44. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






45. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






46. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






47. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






48. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






49. The more stressed out the male is - the less sperm he is going to produce






50. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)